interior design to comfortably fit all drivers in the car
TRANSCRIPT
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Interior Design to Comfortably Fit All Drivers
in the CAR.November, 2013
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October 10, 2013
Wall Street Journal reported that short and tall drivers look for car that fits their body size.
2013 Best
Short Driver
Acura MDX
Mazda 3
VW Passat
Lexus LS, ES, RX
Tall Driver
Kia Optima
Honda Odyssey
Ford Fusion
Nissan Altima
All Drivers
Mercedes S-Class
Subaru Forester
Honda Accord
(Consumer Reports & Edmunds)
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Despite new math models, design of interior space still begins in 2010s as in 1950s with data from older vehicles and no seating.
1950s 201
0s
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How are driver feelingsabout interior design space “fixed” with no seat in new
vehicle?
Cramped
Stretched
6’4”
4’11”
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OEMs define interior space with Oscar’s position, data from
older vehicles, and no seat design.
MirrorSteering WheelPedalSeat ?
“Oscar”
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Thus, with Oscar’s position in 2008, engineers build seat for drivers in a
2013 vehicle .
Prototype
Testing
Position
2013
2008
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It is little wonder that engineers struggle to maximize fit when
90% of driver’s contact with car
is ignored in interior design space.
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Research at Michigan State University in the Ergonomics Research Laboratory (ERL)
uncovered absence of seated drivers in interior design space.
?
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MSU research learnedthe seat constrains sitting
postures that control driver’s selection of seat
position in car.
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In MSU drive studies, 19 drivers drove 2 hours in production seat and then an ERL seat modified for back postures.
Production seat
ERL seat
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ERL’s seat changed interior design space.The average change from production seat was: seat position moved forward 19 mm; steering wheel moved up 3.6°;eye position rose 11 mm and rearward 17 mm.
Modified Seat
Production Seat
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The changes with ERL seat design produced 19 mm
more effective seat travel for tall drivers in a car criticized
for lack of space.
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ERL then developed model that calculates what driver feels in the
seat!Buick LaCrosse
ERL Small Female Model predicted:Cushion too long
Cushion too wide
Too much support at nose of cushion
Lower Backrest too narrow
Upper backrest too wide
And, illustrates:Steering wheel too close
Toe operates Accelerator
Actual Small female driver says:“cushion- a little long - …head rest- a little hard to move, orientation bad - ... - too close to steering wheel - back rest lateral too low and are pushing my arms”
US Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
4’ 11” Tall
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ERL demonstrated that seated
driver models can accurately predict driver fit and comfort
with vehicle data only in CAD.
SAE 2012-01-0450
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The same seated driver models can
design a seating package for the car!
US Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
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ERL design optimizes seating package to fit all drivers in the
car.1 - Personal Comfort 2 - Equipment & Seat
Cushion
Length
Bolster Pressur
e
Lumbar
Support
Head Restrai
nt
Steering
Wheel
Accelerator
Mirror
Seating Surface on
Frame
Airbag
Joint Angle
sIP
Line of
Sight
Sitting Postur
e
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Small drivers want to sit in seat for best vision but not cramped by
steering wheel.
Standing Height = 1492 - 1518mm (4’10¾” - 4’ 11¾”)
US Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
4’11”
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Tall drivers may have to slump for headroom but not stretch for
controls.
Standing Height = 1865 - 1914 mm (6’1½” - 6’ 3½”)
US Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
6’3”
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Seats have 2 Design Functions that
control driver position in the car.1. Surface that
controls driver postures.
2. Frame that positions seat in vehicle
US Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
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Today, OEMs’ “design for fit” depends more upon frame position in older vehicles
than driver position in new vehicle.
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Small, Medium & Large Seated drivers should design cars for
fit.
Erect
Neutral
Slumped
“Oscar”
US Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
4’11”
5’9¼”
6’2”
4’11¾”
5’10¼”
6’3½”
4’10¾”
5’8½”
6’1½”
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ERL could have improved design in
Pontiac G6 for small and large drivers.2008 Pontiac G6 2013 Comfort Design
4’11”
6’3”
US Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
Comfort Score 7.5/10
Comfort Score 9.1/10
Comfort Score 4.8/10
Comfort Score 7.3/10
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ERL starts interior design with seated
drivers and evaluates design in CAD.
Oscar for Regulations
Design Seat &
Evaluate in CADUS Patents: #6,840,125, #7,047,831, #7,347,114, #7,797,138
Design Seated Interior
4’11”
5’9”
6’3”
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Then, OEM verifies ERL prototype with Oscar & real
drivers before car is manufactured.
Test Prototyp
e
Best for All Drivers
Build prototype & verify design
Production satisfies all
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For additional information:
(517) 256-3180www.erlllc.com